ACKNOWLEDGMENTS 



The Museum of Vertebrate Zoology is under obligation to numerous persons 

 and organizations for support and assistance in the prosecution of the Yoscmite 

 survey. The greatest aid from any one source has come from Miss Annie M. 

 Alexander, who made the enterprise possible through her unstinted financial 

 support of the Museum during the several years in which the field and office work 

 has been under way. Her unswerving faith in the worthiness of the undertaking 

 served continually to encourage and energize those who were concerned with its 

 conduct. 



When the plan was first outlined it was put before Dr. William F. Bad^, then 

 President of the Sierra Club. Its merits and feasibility were enthusiastically 

 endorsed by him and subsequently by the Sierra Club formally. This endorsement 

 went far toward bringing the enterprise to the favorable attention of the people 

 in Washington and in Yosemite Valley, to whom we later found it needful to 

 appeal for material help of various kinds. 



Mr. Stephen T. Mather, Director of National Parks, besides personally con- 

 tributing to the fund for field work, has rendered aid in other ways. Financial 

 help, at a time when this was most needed, was received also from Mr. George W. 

 Marston of San Diego and from Mr. James D. Phelan of San Francisco. 



The National Park Service of the Federal Government granted the special 

 permits necessary for the taking of specimens within the boundaries of the 

 Yosemite National Park. Many of the local employees of the same Service ren- 

 dered valuable aid. To Mr. Gabriel Souvelewsky, then Supervisor of Yosemite 

 Park, we owe grateful acknowledgment for immediate and practically expressed 

 interest in our program of field work in the winter of 1914-15. Among others in 

 the Valley who have helped us materially we may mention in particular Messrs. 

 W. B. Lewis, E. P. Leavitt, Forest S. Townsley, Ansel F. Hall, Charles C. Bull, 

 Charles W. Michael, N. L. Guiberson, and the late George W. Bell. Information 

 on specific and general questions has been freely furnished by these men, and many 

 valuable specimens have been secured through them for the Museum of Vertebrate 

 Zoology. Many of the organizations engaged in business connected with Yosemite 

 Valley aided our enterprise by granting special privileges. Among these are to 

 be named the Yosemite Valley Railroad Company, The Yosemite Transportation 

 Company, The Sentinel Hotel, and The Curry Camping Company. The Sierra 

 Club, during the field season of 1915, gave us the use of their pack train. 



The colored and wash drawings used for illustrating the present volume were 

 executed by Major Allan Brooks upon the basis of Yosemite materials. The skill 

 of Mrs. Frieda L. Abernathy was very helpful in preparing the line drawings. 

 The photographs used were taken in course of our regular field work except four 

 whose outside sources are acknowledged in their respective captions. To Professor 

 Oliver M, Washburn, Manager of the University of California Press, we are 

 indebted for important help in assembling the illustrations that appear in this 

 book. And to Mr. Joseph W. Flinn, Superintendent of the University Printing 

 Office, we hereby express our appreciation of his personal interest in guiding the 

 work through the press. 



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